Furry stuff, oekaki stuff, and other stuff.
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Any error messages? Do the applets actually forward to the comment screen, or do you get a pop-up within the applet itself? If so, does it say anything about an HTML 403 error? Most of the time this is caused by a "special" security issue and requires a different CHMOD number. For example, in some rare cases, you might have to CHMOD the applet JAR file to get it to work.
If you're not getting anything useful I can go by, I'd like a link. The kind of hosting service can be a factor.
I have a similar problem to sfox8. I've installed Wacintaki ver 1.3.6 (as a new install), and everything works great- except I can't send/upload finished oekaki at all. I've checked all the folders for chmod errors, and the config (nothing is locked), but everything looks okay. Please help! What am I doing wrong?